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Transcript

DEVONIAN

Comprises about 88% of geologic time

(4500)

CAMBRIAN

Geological timeline

Mariana Arzoz Spada #4

PRECAMBRIAN

  • First multicelled organisms
  • First one-celled organisms
  • Origin of earth
(HADEAN EON, ARCHEAN EON, PROTEROZOIC)
  • First rocks
  • Massive volcanic activity
  • Archean: first areas of continental crust appeared
  • The earliest types of fossils to be found in any quantity are traces of microbial mats.

  • First fishes
  • Trilobites dominant
  • First organisms with shells

  • First insect fossils
  • Fishes dominant
  • First land plants

AGE OF INVERTIBRATES

(540 MYA)

SILURIAN

ORDOVICIAN

(490 MYA)

(443 MYA)

(417 MYA)

CARBONIFEROUS MISSISSIPIAN/PENNYSLVANIAN

(323MYA)

AGE OF AMPHIBIANS

AGE OF FISHES

Paleozoic

541-252 million years ago

MESOZOIC

252- 66 MILLION YEARS AGO

CENOZOIC

66 MILLION YEARS AGO- PRESENT

(era)

(323 MYA)

AGE OF AMPHIBIANS

PERMIAN

  • Extinction of trilobites and many other marine animals
  • First reptiles
  • Large coal swamps
  • Large Amphibians abundant.

(354 MYA

TRIASSIC

(490 MYA)

JURASSIC

(206MYA)

AGE OF REPTILES

CRETACEOUS

(144 MYA)

AGE OF REPTILES

  • First flowering plants
  • First birds
  • Dinosours dominant
  • Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

TERTIARY PALOGENE

PELEOCENE

EOCENE

OLIGOCENE

MIOCENE

PLIOCENE

QUATERNARY

(65)

(54.8)

(33.7)

(23.8)

(5.3-2.6)

  • Humans develop
  • Age of mammals
  • Extintion of dinosours and many other species
  • Common Cenozoic fossils include cat-like carnivores and early horses, as well as ice age woolly mammoths.

PLEINSTOCENE

HOLOCENA

(2.6-0.01)

(.01- PRESENT)

AGE OF MAMMALS

  • The Pleistocene Ice Ages began about 2.6 MYA.
  • The "Age of Mammals" also includes humans—the earliest known evidence of Homo sapiens in the fossil record is from 300,000 years ago.

  • Massive ice sheets advanced and retreated across North America during much of the QUATERNARY.

  • Fish diversified and marine organisms were very abundant.

  • The massive cliffs represent a Permian-age reef along the supercontinent Pangaea. The uppermost rocks of Grand Canyon National Park are also Permian.

  • The mountains began forming during the Ordovician.
  • Elevations similar to Himalayas

AGE OF EARLY LIFE

  • Pangaea began separating into the modern continents, and the modern Rocky Mountains rose.
  • Dinosaurs, crocodiles, and pterosaurs ruled the land and air.
  • As climate changed and rapid plate tectonics resulted in shallow ocean basins, sea levels rose world-wide and seas expanded across the center of North America.

PHANEROZOIC EON

541 MILLION YEARS AGO- TO PRESENT

(66-23 MYA)

TERTIARY NEOGENE

(23-2,58 MYA)

(2.58MYA - PRESENT)

(4027 MYA)